retardant

Borrowed from French retardant, equivalent to retard (“to slow down”) +‎ -ant.

retardant (comparative more retardant, superlative most retardant)

1. (often in combination) Serving to impede (slow down) the action of something

retardant (plural retardants)

1. (often in combination) Something that serves to retard (slow down) the action of something.
   • 2020 February 26, George Monbiot, “Toxic sofas are a secret scandal – and an ‘EU red tape’ bonfire will make it worse”, in The Guardian‎^[1]:

     It took until last year for mattresses and furniture containing the highly toxic retardant deca-BDE to be banned, under European law, from sale. […] To make matters worse, far from saving us from fires, flame retardants appear to increase the risk.

• fire retardant
• flame retardant

retardant

1. gerund of retardar

• Audio (France (Vosges)):

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retardant

1. present participle of retarder

retardant

1. third-person plural present active indicative of retardō